Controlling multi-fort hunt groups in a distributed control switching system

US4694487A · kind A · utility

Assignee

• American Telephone and Telegraph Company, AT&T Bell Laboratories · US

Inventors

• Shih-Jeh Chang · Naperville, US
• Richard T. Emery · Aurora, US
• Shafik J. Hakim · Naperville, US
• Douglas S. Sand · Naperville, US

Key dates

• Filing date: Feb 7, 1985
• Grant date: Sep 15, 1987
• Expiry date: Feb 7, 2005

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04M3/46
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A distributed control switching system where the system control units cooperatively perform the terminating port determination function. Multi-port hunt groups having members that span a number of switching modules each having an associated control entity, are controlled in an efficient manner by assigning, for each multi-port hunt group, one of the switching modules as the group controller for that multi-port group. All calls to a given group necessarily require a control communication with the group controller which maintains the dynamic busy/idle data for the group and performs the hunting function to assign idle group members to calls.